Starting arrangement for internal-combustion engines



Decn 11, 1928. 1,695,218

|=. v|E-r` STARTING ARRANGEMENT FOR INTERNAL COMBUSTION ENGINES (weary/-Patented Dec. 11, 192s UNITED STATES.

' PAUL yVIEi, OF BILLANCOURT, FRANCE., n

STARTING ARRANGEMENT :son INTERNAL-COMBUSTION ENGINES.

` Application led February 6, 1926, Serial No. 86,641, and in FranceSeptember 3, 1 925.

The present invention relates to a starting arrangement for internalcombustion en-v gines, and more particularly to means for supplying suchengines with air carburetted with petrol (or any other' carburettingliquid or gas) which is taken from a small auxiliary internal combustionengine during the compression period, said auxiliary engine utilizingfor its normaloperation the same 1U carburetted air. L

The specification and the annexed drawings show various constructions ofarrangements accordingto the invention.

i In the accompanying drawings:

Fig. 1 is a diagrammatic section of the auxiliary starting engine.

Figs. 2 and 3 show two constructions of a device for re-carburetting thecarburetted mixture before its admission to the engine to be started.

Figs. 4, 5 and 6 show-different positions of the cock which serves forconnecting the bodies of the carburetter and the atomizer shown in Figs.2 and 3.

Fig. 7 is a view in elevation showing the connection of the auxiliarystarting moto'i` to an internal combustion engine.l

Fig 1 shows in diagrammatic section the device which comprises a smallauxiliary ordinary four-cycle motor 1, having in addition totheadmission valve 2 which may be either positively operated or'automatic,and the discharge valve 3, a third controlled valve 4, the stem of whichhas been packed tight by means of a suitable packing device 5, forinstance, a, packing gland. This "valve enables the carburetted air,used for the normal operation of the auxiliary engine 1 (whilst same isin the compression period) to pass into a portf, the capacity of whichis made as small as possible and which is closed by an .autos maticvalve/7 loaded by means of a spring t3 which may be regulated forinstance by means of a screw ca 9. The valve 7 connects in its openposition the port 6 with a pipe 10 leading to the engine to be started.

The operation of this arrangement'is as follows: v

The auxiliary engine lis designed to have a compression chamber ofsmaller volume than usual, which enables the carburetted explosivemixture to be compressed to the highest possible degree (6 to 10 kgs.for 'in' stance) when the piston moves. towards the end of its upwardstroke, the valve 4 is lowestablished by the valve 7, enables the excesspressure to pass away, and the valve L1 closes after the explosion. Ateach compression in the auxiliary engine, a portion of the carburettedmixture will therefore enter the cngine to be started until the vmaximumdegree of compression in the latter is reached. An electric spark, whichmay be'produced by a storage battery or a starting magneto, will thussuiiice for starting the 'engine to be started. In case a mis-timedignition should take place owing to the high degree of compression7 nodamage would be caused thereby, and the engine would merely startautomatically.

ln Figure 7 is shown the auxiliary motor 1 connectedby .its outlet pipe10 and the pipe 27 to the carburetter 12 and from such carburetter bythe pipe 28 to the intake of the motor 29 to be( started.

Where it is not desired -t'o re-carburet the mixture for th'e engine tobe started the outlet pipe 10 can be connecteddirectly to the engine.

Inthe example just described it was assumed that a four-cycle engine,would be used, but a two-cycle engine, witlwrwithout auxiliarycompression cylinders, could be used equally well. A suitablecontrollingvvalve may also be used instead of the screwcap 9 and spring8.

It must, however, be observed. that the nor- 9 mal carburetted mixturesupplied bythe pipe pure air in the the adrnlion pipe; it is thereforerendered lean and it is advisable to re-carburet same to the normaldegree, if faulty starting is to :be started and in,

be avoided, though the engine may be started underlcircumstances withlthe mixture of thel auxiliary engine, without any re-carburettingarrangement. y

For this purpose, a sim le atomizer' as' shown in Fig. 2 or a dou leatomizer as shown in Fig. 3 may be added to 'the c arburetter 11 of theauxiliary engine 1. Accordingto Fig. 2, the carburetter 11 is Y opening19.

in communicatiomwith the atomizer 12 by means of a cock 13. The mixtureto be recarburetted enters through an `opening 14 into the chamber ofthe atomizer 12. The pressure acting upon the free surface of the liquidforces the latter to pass into the simple sprayer 15 and then atomizesthe liquid in the gaseous current passing around the sprayer, beforepassingk the normally saturated mixture to the engine to be startedthrough pipe 16. The charging of the carburetter 1l of the auxiliaryengine l and the atomizcr 12 of the engine to be started may beaccomplished by means ot a plug 17. The cock 13 enables the tWoreservoirs 11a and 12a to be brought into communication during thecharging and to be separate from one another during starting, so as tomake the reservoir 11 of the atomizer 1l pressuretight. The chargingmight also be eil'ected by means of an additional pump or a chargingreservoir.

In the re-carburetting arrangement according to Fig. 3 a carburetter 11of the auxiliary engine is connected to a double sprayer 18,

which as inthe previous case is entered by the mixture to bere-carburetted through an A The pressure present in the sprayer forcesthe carburetting liquid to pass into the sprayer 20; this liquid is thenatomized in the atoinizer 21 by the gaseous current lpassing around thesprayer 20. A branch passage of the compressed gaseous mixture providedwith a. valve 22 loaded by a spring 23, causes said mixture to open thevalve 22 in expanding, and eiects the spraying and the normalcarburation ofthe re-carburetted mixture before the latter passes to theengine to be started. 'l i The reservoirs 11a of the carburetter andl18a of the sprayer communicate with each other through a cock 24, tothe plu 1r of which the carburetting liquid isadmittedbby'a pipe 25 (seeFig. 5). This cocky 24 may assume three dilerent positions:

4 1. The position according to Fig. 4 which permits air inthe reservoir18a to escape through pipe 26.

2. The position according to Fig. 6 in which' the reservoirs 11 and .18are 1n`communication.

3. A closing osition not shown, which during the starting period causesthe previously mentioned openings to be closed so as gine has beenreached.

to render the reservoir 18 absolutely tight, and prevent pressureentering throu h the openings 19 from being transmitted or instance tothe charging reservoir, and avoiding bursting of the latter.

Claims:

1. A starting device for internal combustion engines comprising anauxiliary internal combustion engine, said engine being provided Withfuel intake and exhaust valves,

'a carburetor in communication with said intake valve, a conduitconnecting said auxiliary engine with the engine to be started, apressure operated valve in said conduit operable to open positionthrough pressure in auxiliary engine only, and means for regulating theopening ot said pressure operated valve to permit escape of a portion ofthe said auxiliary engine to said passage, and a.

second carburetor interposed in said passage for further carburettingthe mixture supplied to the engine to be started.

3. A starting device for internal combustion engines comprising anauxiliary internal combustion engine, said engine being provided Withfuel intake and exhaust valves, a carburetor in communication with saidintake valve, a conduit connecting said auxiliary engine with the engineto be started, a pair of valves in said conduit, a cam shaft, means onsaid cam shaft for controlling said intake and discharge valves and oneof said pair of valves, and spring regulated means for controlling theother of said pair of valves to permit said other-valve to open when apredetermined pressure in said auxiliary en- In testimony whereof Ihereunto aiix my signature.

PAUL VIET.

